Machine for finishing the edges of plate-glass.



G. M. TREMMEL. MACHINE FOR PINISHING THE BDGES 0F PLATE GLASS.

i APPLICATION FILED JAN. 19. 1912. 1,074, 1 41 Patented Sept. 30, 1913.

3 SHEETS-SHEET 1.

CDLuMBU PLANDGRAPH c0..wASH|NGTuN. D. cA

e. M. TREMMEL. l MACHINE FOR FINISHING THE EDGES 0F PLATE GLASS.

APPLIOATION FILED JAN. 19. 1912. 1 ,074,1 41

' Patented Sept. 30, 1913.

3 SHEETS*SHEET 2.

Imenr A George/1f Wem/nei.

COLUMBIA PLANOGRAPH C0.. WASHINGTON, n. c,

G. M. TRBMMEL. MAGHINE PoR PINISHING THE BDGBS 0F. PLATBGLASS.

APPLICATION FILED JAN-19, 1912.

' Patented Sept. 30, 1913.

3 SHEETS-SHEET 3.

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CoLuMm PLANoaRAPl-l C0..wAsmNToN. D. c.

narran srarns, PATENT operon. i

GEORGE IVI. TREMMEL, OF TWO RIVERS, WISCONSIN, ASSIGNOR TO THE TREMMEL ART GLASS WORKS, OF TWO RIVERS, vVVISCOI\TISI.`N', A CORPORATION 0F WISCONSIN.

MACHINE FOR FINISI-IING THE EDGES OF PLATE-GLASS.

1,074,141. Specification f Letters Paten'- Iitteiited Sept. 30, i913.

Application iled January 19, 1912. Serial No. 672,096.

To all hohem t may concern Be it known that I, GEORGE M. Tamiami,

a citizen of t-he United States, and a resident of Two Rivers, in the county of Manitowoc and State of IVisconsin, have invented a certain new and useful Machine for Finishing the Edges of Plate-Glass, of which the fol when the glass is to be. used for a table top,-` shelf, or the like, the edges of the glass areI iinished so as to render them smooth and straight. So far as I am aware ,this iinishing is usually effected by means of an abrading wheel, as a wheel made vof emery, car-l borundum, or the like, across which thel edges to be finished are passed. Two forms oi' finish are commonly employed, the edges of the glass being ground either flat or oval. Also, where the edges arefinished fiat, the corners are chamfered so as to dull said corners, so that they will not cut objects coming in contact therewith. Y

The object of thepresent invention is to provide a machine for thus finishing. the edges of the plate glass which will be substantially automatic in its operation, and which will perform its designed work both ettectively and economically, as compared with present methods.

To efl'ect .the objects of the invention, my

improved machine comprises the variousl features, combinations of features and details of construction hereinafter described and claimed.'

In the accompanying drawing, `in which my invent-ion is fully illustrated Figure 1 is Va front view of my improved machine. Fig. 2 is a right hand side elevation thereof. Fig. 3 is a `sectional elevation of the lower part of the machine on the line 3 3 of Fig. 1. Fig. a' is-a sectional plan view on Vthe line 4 4 of Fig. 1. Fig. 5 is a sectional view on an enlarged scale on the line'5 5 oiE Fig. 1. Fig. 6 is a sectional elevation on the line 6 6 of Fig. 5. Fig. 7 is an enlarged sectional view on the line 7 7 o1 Fig. 1. Fig. 8 is an enlarged sectional elevation on the line 8 8 of Fig. 1; and Figs. 9 and 10 are enlarged fragmentary detail Views illustrating the construction and operation of.

the gage rods for positioning the glass in the machine.

The operative parts of the machine are i mounted upon a suitable frame which is suspended from a track or rail A secured to the ceiling of the room in which the machine is set up for operation, or to any other suitable support, by means of brackets a, the manner of suspension being such that the entire 1nachine will be bodily movable in both directions lengthwise of said track or rail A. As shown, the frame of said machine comprises upright frame members 1 and 2, rigidly vconnected at their upper ends vby transverse frame member 3, said trame being suspended from the track or rail A by means of hangers 4 of the general type commonly used for supporting sliding doors, and which preferably comprise anti-friction rollers 5 rotatably mounted in the frame of the hanger, which are adapted to run upon the upper edge of the said track or rail A. In the preferable construction shown, the trame members 1, 2 and 3 are rigidly connected by angle plates 6, which, as shown, are also formed integral with the frame portions of the hangers 1.

Reciprocating movement endwise of the track or rail A. is imparted to the machine by suitable means, as will presently be described, and during such reciprocating movement, the lower` end of the machine frame is supported against lateral displacement, and is guided by .projections on the lower ends of the upright frame members 1 and 2, which engage suitable guide slots formed in rigid supports located beneath said frame members 1 and 2. As shown, the projections on the frame members 1 and 2 consist of studs 7 secured in the lower ends of said frame members 1 and 2 and which engage slots 8 formed between the adjacent, spaced edges of bars?) secured to the upper edges of U-shaped supports 10 secured in fixed position to the upperends ot' pests or standards 11 rigidly connected tothe floor or other Ysuitable support. To reduce friction between said studs 7 and the sides of said slots 8, anti-friction rollers 12 are preferably mounted on said studs 7.

VDuring the operation of the machine the plate of glass, designated 13, is supported in a suitable clampingframe mounted in the upright frame members 1 and 2 of the main frame of the machine so as to oscillate freely about an axis which extends substantially parallel with the guide slots 8 for the lower ends of the frame members 1 and 2. As shown, the clamping frame for said plate of glass 13 comprises askeleton structure consisting of longitudinal members 1st and 15 rigidly connected at their ends by transverse frame members 14 and 15, said skeleton structure being preferably made of cast iron and the different sides thereof formed integral with each other. For purposes of convenient reference said clamping fralne will hereinafter be designated, as a whole, B. Supported on said skeleton frame B and adapted to frictionally engage opposite sides of the plate of glass 13 are suitable clamps consisting, preferably, of wooden bars 16 and 17, arranged in pairs and secured to the upper and lower ends of upright frame members 18 and 19, respectively, secured at their vertical centers to the longitudinal members 14 and 15 of the skeleton frame B. As shown, the frame members 18 are rigidly secured in fixed position to the member 14 of the skeleton frame B, while the members 19, which carry the clamping bars 17, are connected to the frame member 15 in such manner as to be adjustable toward and from the clamping bars 16 secured tothe frame members 18. As shown, said frame members 19 are adjustably supported by mea-ns of a screw 20 threaded through the frame member 15, the inner end of which is connected by means of a swivel joint to a channel bar 21, to which said frame members 19 are rigidly secured. Obviously with the described construction the clamping bars 17 may be adjusted toward and from the clamping bars 16, to either grip or release the plate of glass 13, by turning said handscrew 20 in one direction or the other, said screw being provided at its outer end with a hand-wheel for conveniently turning the same. Tipping or tilting of the clamping bars 17, while adjusting the same, is prevented by pins or projections 22 on bars 23 secured to the ends of said clamping bars 17, which pins or projections engage guide grooves 2e formed in the inner surfaces of the end frame members 14 and 15 of the skeleton frame B. Said clamping frame is mounted on the upright frame members 1 and 2 in the following manner: Secured to the ends of the skeleton frame B are brackets 25 and 26 formed on the lower ends of which are trunnions 27 and 28 which are rotatably mounted in suitable bearings formed in bearing blocks 29 slidably lit-ted to guide slots 30 formed in the lower ends of t-he upright frame members 1 and 2, as shown in cast metal extensions 31 forming the lower ends of said upright frame members 1 and 2, the relation being such that the axes of such trunnions 27 and 28 will coincide subthreaded through webs which close the,

lower ends of the slots 30, and which project upwardly in said slots 30. Said stop screws 32 are adapted to be secured in adjusted positions by means of lock nuts threaded thereto below the closed ends lof the slots 30. lith the described construction it is obvious that the projecting upper ends of said screws 32 will operate to define the lowermost positions Vof said bearing blocks 29, and at the lowermostpositions of said bearing blocks may be conveniently varied by properly adjusting said screws 32.

The lower edge of the glass 13 is adapted to rest lightly in contact with the upper surface of a wheel 33 of suitable abrading material, as emery, carborundum, or the like, secured to rotate with an upright shaft 34 rotatably mounted in suitable Y bearings formed in a supporting frame 35 secured to the floor or other support, and'to which rotation is adapted to be imparted from'any suitable source of power, not shown, by means of a belt adjusted to a driving pulley 36 on said shaft.

1n operation the bearing blocks 29 are adjusted so as to bring the axisV of the trunnions 28, which support the clamping frame B, substantially on a line with the upper surface of the wheel 33,7which will of course coincide with the lower edge of t-he glass 13.

In order that the lower edge of the glassV 13 may bear lightly upon the surface of the abrading wheel 33, means are provided for transferring almost the entire weight of said glass 13, the clamping frame B, and adjunctive parts, to the upright frame members 1 and 2. As shown, said means consists of coiled springs 37, the lower ends ofV which are secured to collars 38 provided with bearings fitted to the ends of thetrunnions 28, which project through and beyond the bearing blocks 29, and the upper ends of which are connected to links '39 which are interchangeable in a vertically arranged series of hooks 4() on the upright members 1 and 2 of the machine frame.k Thus, when a the plate of glass 13 is heavier, which would extend the coiled springs 37 desiredV light-V i ness of engagement of the lower edge of said plate of glass with the abrading wheel 33 may be effected byvengaging the links 39 with upper hooks of. said series of hooks 40 and vice versa. Y

The plate of glass 13 is adapted to be positioned in the machine in proper relation to the grinding wheel 33 by means of suitable gages, consisting, as shown, of rods 41 secured inthe clamping bars 16, the lower vends of which are bent substantially at right angles to form-V arms 42, which project inwardly beyondV the inner faces of said clamping bars 16, and on which the loweredge of said plate of glass is adapted to rest'while the adjustable clamping bars 17 are being set up to secure said plate of glass in the clamping frame. As said arms 42 extend below the lower edges of the glass, they would, of course, be gr-ound olf by the grinding wheel 33 unless moved out of position by contact therewith. To provide for thus moving said gage arms 42 into positions out of Contact with said grinding wheel, the rods 41 are mounted in the clamping bars 16 in such manner that they may be turned to disengage the arms 42 from the lower edge of the plate glass 13 and then raised bodily-to bring said arms above the lower edge of said plate of glass and secured in such raised positions. As shown,

clamping bar 16 formed, as Shown, by thev upper side of saidclampingbar andrshoulders 44 formed at the bottoms of grooves 45 which open laterally into the bearings for said rods 41, said grooves 45 being made of proper width to permit said rods 41 to be Vturned axially to disengage the gage arms 42 from the lower edge of the plate of glass 13-this being necessary before said rods 41 can be raised. To provide for conveniently manipulating the rods 41, the up per ends thereof are bent over Jto-form handles 46. Springs 47 inserted over the rods 41 between collars 48 thereon on the under side of the upper clamping bar 16 operate to create a frictional engagement between ythe pins 43 secured in said rods and the upper side` of said clamping bars 16 when said rods are in raised position, `whichwill tend to prevent accidental turning of the said rods41 in the operation of the machine, which might otherwise bring said pins 43 into register with the grooves 45, thus perinitting said rods 41 to drop so that the gage `arms 42 thereon would come into contact with Vthe grinding wheel 33. Positive stops may be provided by providing projections, as pins 49, at the edges of said grooves 45, between the positions of said rods 41, corresponding to operative and inoperative positions' of. said gage arms 42.

For convenience in inserting the plate of glass 13 into the clamping frame B, means are preferably provided for raising said clamping frame so that the lower edge of the plate of Vglass when secured in designed position in said clamping frame will be above the surface of the grinding wheel 33,

and for securing said clamping frame inv such position. As shown, said means are as follows: Rotatably mounted in suitable bearings formed in webs 50, on the angle bars 6 of the machine frame, is a rod 51, the outer ends of which are bent substantially at right angles to form crank arms 52, pivoted to the outer ends of which are rods 53 formed in the lower ends of which are suitable eyes, through which the trunnions 27 and 28 of the clamping frame B, extend, said rods 53 being shown as inside of the collars 3S on said trunnions to which the balance springs 37 are connected.

The clamping frame B is adapted to be raised and secured in raised position by means of a lever 54, pivoted to one of the upright frame members, as shown to the member 2, which is connected by means of a link 55 with the rod 53 on the same side Vof the machine, the ends of said link be ing pivoted to said lever 54 and rod 53 to provide for moving said lever 54 pivotally. lVith the described construction it is obvious that pivotal movement of the lever 54 will operate to raise and lower the rod 53 to which the link 55 is connected, and also, through the rod 51 and the crank arms 52 thereon, the opposite arm 53, whereby both ends of the clamping frame Bwill be raised and lowered correspondingly. Said clamp- Yoval or rounding, oscillating movement is imparted to the clamping frame B when the machine is in operation, as presently described, and in order that the lock lever 54 which supports the suspending rods 53 may not interfere with the slight raising and lowering of the glass plate 13 and of the clamping frame B as said plate and frame oscillate, means are provided to permit slight vertical movement of said suspending rods 53 independently of the operating lever 54. As shown, this is effected by forming the link 55 in two sections, the ends of which overlap and which are connected by means of a stud 58 secured in one of said sections which extends through a slot 59 formed lengthwise in the overlapping end of the other, said stud being secured in engagement with said slot by means of a suitable head on the outer end thereof which overlaps the edges of the slot 59.V Also, to prevent flexing of the sections of said link 55 relatively to vided with marginal langes 60'which embrace the edges of the other section of said link.

Reciprocating movement is adapted to be imparted to the machine frame in thelfollowing manner: Rotatably mounted in suitable bearings formed in brackets 6l secured to the track or rail A is a feed screw 62, the screw threads of which engage the threads of a nut 63 clamped in a suitable bearing formed on the body portion of one of the hangers l, as shown by a removable cap 64 forming part of said bearing.

Rotation in opposite directions is adapted to be imparted to the feed screw 62 by means of usual open and crossed belts, not shown, adjusted to driving pulleys on said screw comprising pulleys 65 and 66 secured to rotate with said screw and an intermediate pulley 67 mounted so as to rotate' freely thereon. In the operation of the machine one of said belts is designed to run upon the tight pulley 65 and the other upon the tight pulley 66, the relation being such that when either of said belts is running on a tight pulley the other will run on the intermediate loose pulley 67, and said belts are adapted to be shifted when the machine frame reaches the limit of its movement in either direction, so as to reverse the direc tion of rotation of the feed screw 66, by means of a usual shipping rod GS movable lengthwise in suitable bearings formed in eX- tensions' 69 on the brackets 61', adjustably secured to which, as by set screws, are collars 70 which project into the path of travel of a rigid part or projection on the machine frame, as shown ribs 71 on a block 72 secured in fixed position to the upper transverse frame member 3. lVith the described construction it is obvious that, as the machine reaches the limit of its movement in either direction, one of the ribs 7l will strike the collar 70 on the shipping rod 68, toward which the machine is traveling, which will operate to impart endwise'move-ment to said shipping rod 68 te shift the belts to reverse the direction of rotation of said feed screw G2, whereby continuous reciprocating movement will be imparted to the frame of the machine.

When it is desired to impart an oval or rounding finish to the edges of the glass,` oscillating movement is imparted to the clamping frame B in the following manner Formed on or secured to the transverse members let and 15 of the skeleton member of said clamping frame are upright arms or projections 7 3 formed in theV upper ends of which are slots 74, slidably fitted to which are blocks 75 pivotedv upon studs 7 6 secured in heads or slides 77 mounted to reciprocate in suitable guides, asvways 78, formed in bars 79 secured in substantially horizontal position to the upright frame members l and 2. With the described construction, it is obvious that `reciprocatory movement imparted to the heads or slides 77 will impart oscillating movement tothe clamping` frame B upon theY trunnion supports 27 and Y28 thereof.V Reciprocating movement is adapted -to beimparted to the heads or slides 77 by meansof suitable connection withV a shaft S0 rotatably mounted Y sprocket wheels and S6, of which the sprocket wheel 85 is secured to rotate with the shaft 8O and the sprocket wheel. Sois splined to said feed screw G2, being maintained in alinement with the sprocket wheel.

Slt between the outer end of the nut 63 and a bracket 87 secured to the frame member 2.

When it is desired to finish the edge of the glass flat, this is effected by throwing olf the chain belt 84's@ that the crank shaft 8O will remain stationaryV and lockingthe clamping frame B in central position with the plate of glass in upright position. Convenient means for this purpose consists of a pin or dowel 88 adapted to be inserted through a hole in one of the heads or slides 77 into a corresponding hole in the guide bar 79 to which said head or slide is fitted.

To Vchamfer the longitudinal corners of the glass, after the edge thereof is otherwise Enished, the pin or dowel SS'is withdrawn and the clamping frame Bis turned to one limit of its movement, which is defined by the cranks 82 and connecting rods 83, in which position it isV maintained by the weight of the glass and of said clamping frame. the glass is properly .chamfered,the clamping frame is turned to the opposite limit of its movement, likewise defined by the cranks 82 and connecting rods 83, in'which position it will also be maintained by the weight of the glass.

rlhe operation having been finished, the machine is stopped, the clamping'frame V80 62 by means of a chain belt 84 adjustedV to Y When one Vlongitudinal.corner of Y B and the plate of glassl are raised by means of the hand lever 541C,V the adjustable Y supported, means for imparting reciprocat! Y mg movement to said frame, a' clampingY frame pivoted in said machineV frame, and

iso

means for imparting oscillating movement to said clamping frame, substantially as described. j

2. A machine for finishing the edges of plate glass, comprising a supporting frame, guides by which said frame is movably supported, said guides comprising a fixed track or rail, and hangers on the upper end of said machine frame which slidably engage said track or rail, fixed supports at the lower end of lsaid machine frame provided with guide slots and parts of or projections on said machine frame which engage said guide slots, means for imparting reciprocating movement to said frame, a clamping frame pivoted in the lower end of said machine frame and means for imparting oscillating movement to said clamping frame, substantially as described.

3. A machine for finishing the edges of plate glass, comprising a supporting frame, guides by which said Jframe is movably supported, means for imparting reciprocating movement to said frame, bearing blocks slidably fitted toguide slots formed in said machine frame, a clamping frame pivotally mounted in said bearing blocks and counterbalance springs applied to said clamping frame, substantially as described.

4. A machine for nishing the edges of plate glass, comprising spaced upright members and a transverse member which con` nects said upright members adjacent to their upper ends, said upright frame members being provided with guide slots, guides by which said frame is movably supported, means for imparting reciprocating movement to said machine frame, bearing blocks slidably fitted to the guide slots in said upright frame members, a clamping frame pivotally mounted in said bearing blocks, means for imparting oscillating movement to said clamping frame, and counterbalance springs applied to said clamping frame, substantially as described.

5. A machine for finishing the edges o plate glass, comprising spaced upright members and a transverse member which connects said upright members adjacent to their upper ends, said upright frame members being providedwithguide slots, guides by which Vsaid frame is `movably supported, means for imparting reciprocating movement to said machine frame, bearing blocks slidably fitted to the guide slots in said upright frame members, a clamping frame .pivotally mounted in said bearing'blocks,

counterbalance springs applied to said -clamping frame, and means for varying the tension of said springs for a given position of said clamping frame, substantially as described.

6.*A machine forV finishing the edges of plate glass, comprising spaced upright members and a transverse member which connects said upright members adjacent to their upper ends, said upright frame members being provided with guide slots, guides by which said frame is movably supported, means for imparting reciprocating movement to said machine frame, bearing blocks slidably fitted to the guide slots in said upright frame members, a clamping frame pivotally mounted in said bearing blocks, counterbalance springs applied to said clamping frame, the upper ends of which are interchangeable in a series of hooks on said uprightframe members, substantially as described. Y

7. A machine for finishing the edges of plate glass, comprising a supporting frame, guides by which said frame is movably supported, means for imparting reciprocating movement to said frame, bearing blocks slidably fitted to guide slots formed in said supporting frame, a clamping frame pivotally mounted in said bearing blocks, and means forA raising and lowering said clamping frame and for securing the same in desired Vertical adjustment, substantially as described.

8. A machine for finishing the edges ot plate glass, comprising a supporting frame, guides by which said frame is movably supported, means for imparting reciprocating movement to said frame, bearing blocks slidably fitted to guide slots formed in said supporting frame, a clamping frame pivotally mounted in said bearing blocks, and means for raising and lowering said clamping frame and for securing the same in desired vertical adjustment, said means comprising a crank rod rotatably mounted in suitable bearings on the machine frame, crank arms thereon, rods or links pivotally connected to said crank arms at their upper ends and to said clamping frame at their lower ends, a hand lever pivoted to a rigid part of the machine frame, means for securing said hand lever in different positions and a link which connects said hand lever with a rod or link connecting said clamping frame with a crank arm, substantially as described.

9. A machine for finishing the edges of plate glass, comprising a supporting frame, guides by which said frame is movably supported, means for imparting reciprocating movement to said frame, bearing blocks slidably fitted to guide slots formed in said supporting frame, a clamping frame pivotally mounted in said bearing blocks, and means for raising and lowering said clamping frame and for securing the same in desired vertical adjustment, said means comprising a crank rod rotatably mounted in suitable bearings on the machineframe, crank arms thereon, rods or links pivotally connected to said crank arms at their upper ends and to said clamping frame at their lower ends, a

hand lever' pivoted to a rigid part of the machine frame, means for securing said hand lever in diticrent positions and a link which connects said hand lever with a rod or link connecting said clamping frame with a crank arm, said link comprising separate sections slidably connected so as to permit of limited endwise movement relatively to each other, substantially as described.

10. A machine for finishing the edges et plate glass, comprising a supporting trame, guides by which said trame is movably supported, means for imparting reciprocating movement to said frame, bearing blocks slidably tit-ted to guide slots formed in said supporting frame, a clamping trame pivotally mounted in said machine frame, counterbalance springs applied to said clamping frame, and adjustable stops which deline the lowermost position of said clamping frame, substantially as described.

11. A machine for finishing the edges of plate glass, comprising a supporting frame, guides by which said frame is movably supported, means for imparting reciprocating movement to said frame, bearing blocks slidably fitted to guide slots formed in said support-ing frame, a clamping frame pivotally mounted in said bearing blocks and means for imparting oscillating movement to said clamping frame, said clamping frame comprising a skeleton structure, downwardly eX- tending arms on the end members thereof and trunnions on the lower ends of said arms adapted to engage suitable bearings in said bearing blocks, the relation being such that the axes of said trunnions will be substantially coincident with the lower edge ot' the plate of glass when secured in designed position in said clamping trame, substantially as described.

12. A machine for iinishing the edges of plate glass, comprising a supporting frame,

guides by which said trame is movably sup-V ported, means for imparting reciprocating movement to said frame, a clamping frame pivotally mounted in said machine trame, and means for imparting oscillating movement to said clamping frame, said clamping frame comprising a skeleton structure, sets of upright cross arms supported on opposite sides thereof and comprising a set of adjustably supported cross arms, and clamping bars secured to said cross arms, substantially as described.

13. A machine for iinishing the edges of plate glass, comprising a supporting traine, guides by which said frame is movably supported, means for imparting reciprocating movement to said frame, a clamping frame pivotally mounted in said machine frame, and means for imparting oscillating movement to said clamping frame, said clamping frame comprising a skeletonk structure, sets of upright cross arms supported on opposite sides thereof and comprising a set oi' adjustably supported cross arms, and clamping bars secured to said cross arms, the means for supporting' said adjustable cross arms comprising a rigid bar to Vwhich said adjustable cross arms are directly connected and an adjusting screw connected to said rigid bar by a swivel joint and threaded through a side of said skeleton structure, substantially as described.

141. A clamping frame for a .machine for nishing the edges of plate glass, compris-v ing a skeleton structure, sets ofiupright cross bars supported on Vopposite sides thereof and comprising a set of adjustably supported cross arms, andl clampingV bars secured to saidcross arms, and gages for delining the designed position of the plate of glass in said clamping frame, substantially as described.

15.l A clamping trame for a machine for nishing the edges of plate glass, comprising a 'skeleton structure, sets of upright cross bars supported on opposite sides thereof and comprising a set of adjustably supported cross arms, and clamping bars secured to said cross arms, and gages for defining the designed position of the plate of glass in said clamping frame, said gages comprising rods mounted in suitable bearings in a set of clamping bars so Vas to be movable both endwise and axially, lateraly projections on said rods, and spaced-stops on one oit' said clamping bars adapted for engagement by the lateral pro'ections on said rods, substantially as described.

16. A machine for finishing the edges ofv plate glass, comprising a supporting frame, guides by which said frame is movably supported, means for imparting reciprocating movement to said frame, a clamping frame pivotally mounted in said machine frame, and means for imparting oscillating" movement to said clamping frame, said means comprising a shaft rotatably'mount'ed in a suitable bearing on a fixed partI of the machine frame, a crank or cranks thereon, a guide bar or bars secured tothe machine trame provided with guides or ways, a slide or slides iitted to reciprocate in said way or ways, a connecting rod or rods which connect the crank or cranks on said shaft with said slide or slides, a block or blocks pivoted to said slide or 'slides and an arm or arms on said clamping frame provided with*- a guide slot or slots to which said pivoted block or blocksare slidably'tted, andmeans for rotating said shaft', substantially asdescribed. Y d

17. A rmachine for finishing the edges of plate glass, comprising a supporting frame, guides by which said trame is movably supported, means for imparting reciprocating movement to said frame, a clamping frame pivotally mounted in said machine frame,

and means for impart-ing oscillating movement to said clamping frame, said means comprising a shaftrotatably mounted in a suitable bearing on a fixed part cf the machine frame, a crank-or cranks thereon, a guide bar cr bars secured to the machine frame provided With guides or Ways, a slide or slides fitted tc reciprocate in said Way or Ways, a connecting rod or rods Which connect the crank or cranks on said shaft- With said slide or slides, a block or blocks pvcted to said slide or slides and an arm or arms cn said clamping frame provided With a guide slot or slots to Which said plv-` oted block or blocks are slidably fitted, means for rotating said shaft, and driving connection between said shaft and the means for reciprocating the machine frame, substantially as described.

In testimony that I claim the foregoing as my invention, I affix my signature in presence of two subscribing Witnesses this 5 day of Jan., A. D. 1912.

EORGE M. TREMMEL.

Witnesses:

E. J. Som, H. C. GOWRAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

